TY  - CONF
CY  - College Park, MD
ID  - usqep34071
UR  - http://meetings.aps.org/Meeting/DFD07/Event/72739
A1  - Suslov, Sergey A.
N2  - [Abstract]: Mixed convection flows in a tall vertical channel with differentially heated walls subject to large cross-channel temperature gradients are shown to exhibit enormous variety of instability scenarios which have
two physically distinct origins: the shear and the buoyancy of the flow. In order to visualize the most typical spatio-temporal patterns and complement previous analytical stability studies the Fourier integrals representing linearised disturbances arising from an
initially localised source are evaluated numerically. The 
disturbance fields are obtained for strongly non-Boussinesq
high-temperature convection of air. They are contrasted to their counterparts in the Boussinesq limits of small temperature gradients. A drastic difference in disturbance evolution scenarios is found. In particular, it is shown that non-Boussinesq natural convection is convectively unstable while mixed convection flows can be absolutely unstable. These scenarios are opposite to the ones detected in the classical Boussinesq convection in the same
geometry. 
VL  - 52 (17)
ED  - Sathyasheelappa, Vinaya K.
TI  - New spatio-temporal instability scenarios in non-Boussinesq
  mixed convection
AV  - public
EP  - /RIS
N1  - Deposited in accordance with the copyright policy of the publisher. Copyright (c) 2007 American Physical Society.

Y1  - 2007/11//
PB  - American Physical Society
KW  - non-Boussinesq convection; spatio-tempoeral instability
SN  - 0003-0503
SP  - 4071
M2  - Salt Lake City, Utah, USA
T2  - 60th Annual Meeting of the Divison of Fluid Dynamics, American Physical Society
ER  -